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143 Commits

Author SHA1 Message Date
Bartlomiej Wolowiec
79b25a27b8 change name from stream type to frame type in AC3 code 
Originally committed as revision 12623 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-03-28 20:42:55 +00:00
Justin Ruggles
509fdb0b7e only allocate context input buffer if AVCodecContext.error_reslience is greater than 0. 
Originally committed as revision 12600 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-03-26 22:36:41 +00:00
Justin Ruggles
984ff38a2b cosmetics: indentation after last commit 
Originally committed as revision 12594 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-03-25 23:34:49 +00:00
Justin Ruggles
c33a196716 additional protection from segmentation faults and memory access errors by 
copying the input buffer to a local context buffer which is large enough to
hold the largest possible AC3 frame.

Originally committed as revision 12593 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-03-25 23:34:00 +00:00
Bartlomiej Wolowiec
4e6eeaf019 using stream type in eac3 parser 
Originally committed as revision 12570 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-03-24 21:25:49 +00:00
Zuxy Meng
98a6fff98c Apply 'cold' attribute to init/uninit functions in libavcodec 
Originally committed as revision 12525 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-03-21 03:11:20 +00:00
Justin Ruggles
98f6dfa653 make input buffer const, as it should be. fixes a warning. 
Originally committed as revision 12418 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-03-10 21:59:30 +00:00
Justin Ruggles
38dae9c3a6 downmix before imdct unless different size transforms are used. about 20% 
faster 5.1-to-stereo downmixing.

Originally committed as revision 12397 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-03-09 17:05:19 +00:00
Justin Ruggles
d8870f120e use scale factor instead of sum for downmix level adjustment. avoids division 
inside downmix loop. 7% faster 5.1-to-stereo downmixing.

Originally committed as revision 12287 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-03-01 16:10:19 +00:00
Justin Ruggles
9d10e6e6c0 pre-calculate downmix coefficient sums. 2% faster 5.1-to-stereo downmixing. 
Originally committed as revision 12286 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-03-01 15:48:18 +00:00
Justin Ruggles
a4de6dd2c1 Use 24-bit fixed-point transform coefficients until just before MDCT. This 
gives 7% faster decoding on average.

Originally committed as revision 12284 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-03-01 04:39:39 +00:00
Robert Swain
3ed546fe52 Add variable alpha and size of half window for Kaiser-Bessel Derived window 
generation. Hard code Bessel I0 approximation iterations to 50.

See thread for discussion:
[FFmpeg-devel] [PATCH] Move Kaiser-Bessel Derived window to mdct.c
Started on the 2008/01/10

Originally committed as revision 11520 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-01-13 11:02:08 +00:00
Robert Swain
4eb7a735cb Make the Kaiser-Bessel window generator a common function 
Patch by Robert Swain, robert d swain a gmail d com

Originally committed as revision 11514 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-01-12 11:11:19 +00:00
Justin Ruggles
f34b221bd2 used defined name for testing error resilience level 
Originally committed as revision 11478 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-01-08 23:44:48 +00:00
Justin Ruggles
f0b3a7ba12 split out init of downmix coeffs into a separate function that can be called 
only when needed

Originally committed as revision 11441 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-01-07 00:18:02 +00:00
Justin Ruggles
82a6c4811a remove unneeded variable from AC3DecodeContext 
Originally committed as revision 11439 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-01-06 23:56:19 +00:00
Justin Ruggles
4bc829bb8f make sure that the last coupling band stops at the end of the coupling range 
Originally committed as revision 11438 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-01-06 23:33:30 +00:00
Justin Ruggles
b02fbf7536 fix phase flag processing for the case when coupling coordinates are reused 
for the right channel, but new for the left channel

Originally committed as revision 11436 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-01-06 20:15:24 +00:00
Justin Ruggles
646800f79c move E-AC3 header parsing to ff_ac3_parse_header() 
Originally committed as revision 11420 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-01-05 18:39:55 +00:00
Justin Ruggles
86ad4c7e1b remove unneeded variables from AC3HeaderInfo 
Originally committed as revision 11419 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-01-05 17:04:57 +00:00
Justin Ruggles
2816d32310 cosmetics: indentation 
Originally committed as revision 11416 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-01-05 15:23:39 +00:00
Justin Ruggles
95283c1701 check for request_channels at codec init 
Originally committed as revision 11415 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-01-05 15:22:53 +00:00
Aurelien Jacobs
3abe5fbdc4 improve CRC API 
- don't export any global var
 - provide either generated or hardcoded tables

Originally committed as revision 11409 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-01-04 23:09:58 +00:00
Justin Ruggles
7564658bbc cosmetics: indentation and add a TODO comment 
Originally committed as revision 11389 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-01-04 00:39:03 +00:00
Justin Ruggles
471db688c6 only check ac3 crc if AVCodecContext.error_resilience > 0 
Originally committed as revision 11388 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-01-03 23:05:53 +00:00
Justin Ruggles
d6939960d5 add crc check to ac3 decoder 
Originally committed as revision 11379 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-01-03 02:26:29 +00:00
Justin Ruggles
12eaa3b760 simplify 
Originally committed as revision 11360 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-12-30 22:58:20 +00:00
Justin Ruggles
b35c67e58b pass an AC3DecodeContext to ac3_downmix() instead of multiple arguments 
Originally committed as revision 11359 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-12-30 22:28:17 +00:00
Justin Ruggles
866181e5e8 cosmetics: rename sampling_rate to sample_rate 
Originally committed as revision 11358 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-12-30 21:26:30 +00:00
Justin Ruggles
0345fade94 do not need to cast a (void *) 
Originally committed as revision 11357 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-12-30 21:24:49 +00:00
Justin Ruggles
1b70d88b7a cosmetics: vertical realignment after last commit 
Originally committed as revision 11356 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-12-30 21:09:08 +00:00
Justin Ruggles
d802d7ca12 cosmetics: rename all AC3DecodeContext variables from ctx to s 
Originally committed as revision 11355 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-12-30 20:58:50 +00:00
Justin Ruggles
23c8cb89c9 cosmetics: rename GetBitContext gb to gbc 
Originally committed as revision 11354 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-12-30 20:47:22 +00:00
Justin Ruggles
005ab694ae remove unused context variable 
Originally committed as revision 11353 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-12-30 03:10:18 +00:00
Justin Ruggles
1408352ada Add option for user to scale the amount of dynamic range compression which is 
applied by the audio decoder, and use that option in the AC3 decoder.

Originally committed as revision 11280 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-12-20 00:55:08 +00:00
Justin Ruggles
03726b7042 Skip dialog normalization. It shouldn't be used by the decoder, and there is 
not currently a clean way to pass the value to the user.

Originally committed as revision 11246 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-12-17 01:09:00 +00:00
Justin Ruggles
224bc440b2 Revert commit made in revision 11228. I'm getting some strange results in the 
downmixed output that I can't quite figure out.

Originally committed as revision 11245 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-12-17 01:03:19 +00:00
Justin Ruggles
b40211ff67 downmix before the IMDCT if no block switching is used 
Originally committed as revision 11228 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-12-16 04:25:50 +00:00
Andreas Öman
6708eefe55 Make AC3 decoder honor avctx->request_channels 
Originally committed as revision 11220 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-12-15 07:00:19 +00:00
Justin Ruggles
e2270b4e1e cosmetics: rename ac3 decoder variables 
Originally committed as revision 11197 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-12-09 03:28:10 +00:00
Justin Ruggles
e59cc20593 cosmetics: rename common ac3 variables 
Originally committed as revision 11196 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-12-09 03:27:14 +00:00
Justin Ruggles
5ce2134258 cosmetics: rename ac3 bit allocation variables 
Originally committed as revision 11194 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-12-09 03:23:04 +00:00
Justin Ruggles
66ecf18e38 cosmetics: rename ac3 tables 
Originally committed as revision 11193 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-12-09 03:21:33 +00:00
Diego Biurrun
56cc85a068 Misc spelling fixes, prefer American over British English. 
Originally committed as revision 11126 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-12-02 15:43:08 +00:00
Justin Ruggles
a135bea507 skip incomplete frames 
Originally committed as revision 10497 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-09-15 02:44:28 +00:00
Justin Ruggles
3df880934e better AC3 header error reporting 
Originally committed as revision 10496 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-09-15 02:41:24 +00:00
Justin Ruggles
d5b7144e1f fix random dithering of zero-bit mantissas 
Originally committed as revision 10495 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-09-15 00:43:40 +00:00
Justin Ruggles
bfcf690c68 cosmetics: rename variables. tbl->tab for consistency with other AC3 tables 
Originally committed as revision 10494 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-09-15 00:19:21 +00:00
Justin Ruggles
396a6ee50e fix decoding of DolbyNet AC3 
Originally committed as revision 10493 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-09-15 00:00:57 +00:00
Justin Ruggles
222ae64c3d cosmetics: vertical alignment 
Originally committed as revision 10002 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-08-09 00:39:35 +00:00